A sports shop had 400 ping pong balls for sale. Each ping pong ball is sold at $2. At the end of each day, the number of ping pong balls sold was recorded in the bar graph shown.
- What fraction of the total number of ping pong balls was left at the end of Day 3? Express your answer in its simplest form.
- If the shop decided to sell every 6 ping pong balls at $8 from Day 4 onwards, how much less would it collect from the sale of the ping pong balls?
(a)
Number of ping pong balls left at the end of Day 3
= 400 - 108 - 114 - 96
= 82
Fraction of ping pong balls left at the end of Day 3
=
82400=
41200 (b)
Number of ping pong balls sold from Day 4 to Day 6
= 108 + 84 + 114
= 306
Amount that it would collect if it sold the 306 ping pong balls at the original price
= 306 x 2
= $612
Number of sets of 6 ping pong balls
= 306 ÷ 6
= 51
Amount that it would collect if it sold the 306 ping pong balls at every 6 ping pong balls at $8
= 51 x 8
= $408
Amount that it would collect less from the sale of the ping pong balls
= 612 - 408
= $204
Answer(s): (a)
41200; (b) $204